Universal milling-machine



4 Sheets-Sheet 1.

(No Model.)

L. GOSGROVE. UNIVERSAL MILLING MACHINE.

Patented Aug. '7, 1883.

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WITNESSES. QwMwm-r M, L aff@ N. PEYERS Phowuuwgnphur, washington D. c.

(No Model.) 4 Sheets-Sheet 2. L. COSGROVB.

UNIVERSAL MILLING MACHINE. No. 282,704. Patentmed Aug. 7,y 1883.

l -WITNIESSES. INVENTOR..

Mfg/Q71 A A /MY) (No Model.) sheetssheet 3.

L. C()S(.`7rROVE.-

VUBIW'ERSM, MILLING MACHINE.

' No. 2182.704. Patented Augf 7, 1883.

WITNESSES. INVENTOB..

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(No Model.) 4 Sheets-Sheet 4.

L. vGOSGROVE.

UNIVERSAL MILLING MACHINE.

N0. 282,704. l 8 Patentd Aug. '7, 1883.

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@Mmow UNITED` STATES PATENT Giri-ICEa LAWRENCE cosGRovE, or BALTIMORE, MARYLAND.

UNIVERSAL MILLING-,IVIACI-INE.

SPECIFICATION forming` part of Letters Patent No. 282,704, dated August .7, 1883;

Application filed March 17, 1883. (No model.)

To all whom it may concern:

Be it known that I, LAWRENCE CosGRovE, of the city of Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Universal Milling-Machines, of which improvements the following is a specication. y

The objects of my invention are to provide in a milling machine simple and effective means for rack-cutting, sawing up long stock or bars of any kind, proling or die-sinking, and cutting regular or irregular outlines; also,

to enable vertical, transverse, and longitudinal.

` Figs. 4 to 9, inclusive, detailed views upon an enlarged scale.

The mechanism is mounted and supported upon a vertical frame, A, to one end of which is fitted a bracket, B, which ,sustains a work table or carriage, C, hereinafter set forth. The bracket Bis adapted to slide vertically between guides A on the frame. The spindle D is supported in bearings a, secured upon the top of the frame A. A driving cone-pulley, E, to which rotation is imparted by a belt from any suitable prime mover, is secured upon av sleeve, F, adapted to turn freely upon the spindle D. A disk, G, keyed upon the spindle D, carries two pinions, b, each fitted to rotate upon a stud iixed in the disk, said pinions meshing with a spur-gear, c, upon the sleeve, and with the teeth of an internal gear, H,

Vwhich is supported at one end by the hub of the disk G, and at the other by the sleeve F of the cone-pulleys E. A removable pin, e, Fig. 1, serves to connect the gear H to the frame A, and thereby prevent the rotation of Ythe former, as may be required in the operation of the machine.

During such time as the internal gear, H, is connected to the disk G, which -may be done by a bolt or other suitable device, the pin c being withdrawn from the disk, the rotation of the cone-pulley E is communicated directly to the spindle D, or, in other words, the cone-pulley and spindle revolve together. By detaching'the. disk G from the gear H and securing said gear to the frame A by the pin e, so as to prevent the rotation above stated, the rotation of the cone-pulley and its toothed sleeve `is communicated to the pinions b, meshing with the -gear H, and said gear being locked, the disk G and spindle D are consequently rotated, and at a reduced rate of speed as compared with the direct rotation irst described.

The cutter-spindlefis mounted in bearingsV in a removable head, I, secured adj'ustably to the frame, and is rotated from the spindle D through the medium of a pair of miter-gears, g, one of which is secured to a short spindle, h, having a tapering end fitting into a corresponding hole in the spindle D, and the other to the cutting-spindlej'.

' By reference toFig. 7, which is a faceview ofY the cutter-spindle head and connections, it will be seen that asegmental slot, i, is formed in the end-flange, i, of the head I, whereby the head may be turned upon its axis, and the cutterspindle correspondingly moved from a vertical to a horizontal or an inclined position, as indicated in dottedlines.

A second and removable spindle, f, is adapted to rotate in bearings f 2, formed in arms or brackets projecting laterally from the head I, and is rotated from thev spindle j' through spur-gears 7c 7c. Milling tools Z of proper form are connected to the lower ends of the spindle f or the 'spindle f', as the case maybe. The object of this second spindle, f, is to admit of cutting teeth in racks, which, when placed on the table, are fed longitudinally to space the teeth and transversely to cut them entirely across the bar or rack.

A bar, K, is supported and is movable longitudinally in bearings m, formed upon or secured'to the frame A, above the bearings a of the spindle D, said bar serving to receive an IOO arm, m. (Shown in dotted lines in Fig. l and on an enlarged scale in Figs. 4 and 5.) In ordinary milling operations the head I is removed and a cutting arbor or mandrel inserted in the spindle D, the outer end of said mandrel being supported by a set-screw, n, engaging the lower end ofthe arm 'm'. i The bar K, when moved into desired longitudinal position, is clamped therein by means ofthe bearings m, which are open and provided with tightening-bolts for the purpose.

The several feed movements are effected as follows: A cone-pulley, L, secured upon one end of the spindle D, is connected by a belt with a similar cone-pulley, L', on afeed-shaft, M, mounted in bearings in the lower portion of the frame. i A spur-pinion, M', on the shaft M, meshes with a similar gearfMZ, upon a second feed-shaft, N, carrying a bevel-gear, O, which meshes with one or the other of two similar gears, O O", fitting loosely on a vertical shaft, N. Either of the gears O' O2 may be made fast, as desired, upon the shaft N' by a clutch, P, tting a feather on the shaft N', which shaft will be rotated in one or in the other direction, respectively, in accordance withthe gear engaged with it.

P', through bevel-gears n' n', secured upon the respective shafts, and a bevel-gear, o, upon the shaft P' meshes with a similar gear, o', upon the lower end of a shaft, o2, which carries a bevel-gear, 19, meshing with a similar gear, p', which has an internal thread engaging a thread on a feed-spindle, p2, iittinginbearings in the upper and sliding section of the carriage C, which section is adapted to move in guides on the lower section.

So far as described .the feed mechanism effects a longitudinal movement only of the carriage, and the transverse and vertical feeds are effected as follows: A downwardly-proj ecting arm, Q, is formed upon the carriage C, and is internally threaded near its lower end, to engage a screw-thread formed upon a shaft, Q', mounted in a bearing on the bracket B of the frame. A spur-gear, R, upon the shaft Q' engages a similar gear, B', upon the shaft P', and also engages a gear, R2, upon a shaft, S, the opposite end of which shaft carries abevelgear, T, which meshes with a bevel-gear, T', upon a vertical shaft, T2. The gears R and R2 are loose'upon their respective shafts, which are fitted with clutches S' S2, sliding on feathers, so that the gears may be made fast to their shafts, as required. A screw-thread is cut upon the shaft T2, and engages a nut, U, fixed to the frame. The upper portion of the shaft S turns freely in a socketed projection formed upon the bracket B, said projection fitting between the gear T' and a collar, t, on the shaft.

It will thus be seen that the bracket B and carriage C will be raised or lowered by the rotation of the shaft T2 in one or the other direction. The shafts S and Q' are provided with squared ends, to which cranks may be applied to effect the rotation of said shafts by hand.

Rotation is iin-- parted from the shaft N' to ahorizontal shaft,

It will be seen by reference to Fig. 1 that all the feeding movements are obtained primarily from the shafts M and N, which are constantly-in rotation, and that any or all of said movementsj'may be started Iand stopped by means of the proper clutch or clutches. Thus anarticle to be operated upon being sccured to the carriage C and the spindle D rotated, the longitudinal feed is started by moving the clutch P into contact with one or the other of the gears O' O2, as the direction of feed may require. lf the work is to be fed transversely, the clutch S is engaged with the gear R, and to impart a vertical movement to the work the clutch S2 is connected to the gear R', the shafts S and T2 being then rotated through the intermediation of the gear R, whether said gear be fast or loose upon the shaft.

I claim as my invention and desire to secure by Letters Patentl. The combination, substantially as set forth, of a cutter-head, a main cutter-spindle fitting bearings on the said head, a supplemental cutter-spindle parallel with the main one, also supported on the head, and connected by gearing with the said main spindle.

2. The combination, lsubstantially as set forth, of a frame, a driving-spindle, a feedshaft receiving rotation therefrom, a supporting-bracket adapted to be moved vertically between guides upon the frame, a work table or carriage having the capacity of movement both longitudinally and transversely uponl said bracket, and a series of intermediate shafts and gearing actuated primarily by the feedshaft, and serving to impart motion to the car-v riage longitudinally,transversely, and vertically relatively to the frame.

3. The combination, substantially as set forth, of aframe, a supporting-bracket movable vertically thereon, a feed-shaft mounted in bearings in the frame, a vertical threaded spindle engaging a nut in the frame and rotat- ICO IIO

ing in a bearing in the bracket, without having end motion therein, and intermediate shafts and gearing for transmitting rotation from the feed-shaft to the threaded spindle.

4. The combination, substantially as set forth, of a frame, a supporting-bracket connected thereto, afeed-shaft mounted in bearings therein, a work-carriage adapted to be moved upon the bracket toward and from the frame, a horizontal threaded shaft engaging a nut upon the carriage and fitting a bearing on the bracket, and intermediate shafts and gearing forimparting rotation to the threaded shaft from the feed-shaft. Y

5. The combination, substantially as set forth, of a frame, a driving-spindle, a -feed shaft receiving rotation therefrom, a supporting-bracket adapted to be moved vertically between guidesupon the frame, a work-carriage having the capacity of movement both longitudinally and transversely upon said bracket, a threaded shaft engaginganut upon the carriage and fitting a bearing upon the brack- 282.704 v l 3v et, a threaded shaft engaging a nut upon the frame, and fitting a socket or bearing on the bracket, Without having end motion therein, a threaded feedespindle engaging a nut on the carriage, and intermediate shafts conneetedby gearing and clutches with the feed-shaft, these members being combined for'j oint operation to impart either longitudinal, transverse, or vertical movements to th e Work-carriage, substantially as described.A

6. The combination, substantially as set forth, of a driving-spindle, a cone-pulley se-A cured upon a toothed sleeve fitting loosely upon said spindle, a disk Xed upon said spindle, and interposed planetary gearing by which the rotation of the cone-pulley may be imparted, either directly or intermediately, to the disk and spindle.

7. The combination, substantially as set forth, of a driving-spindle, a spur-toothed sleeve hitting loosely thereon, a disk secured thereon andearrying two spur-pinions mesh-r ing with the teeth ofthe sleeve, an internal gear fitting loosely on the sleeve or spindle and meshing with the spur-pinions, and mechanism for connecting said internal gear' eithergvith the disk of the spur-pinions or with a ixed abutment at pleasure. 

